Commission Implementing Regulation (EU) 2016/799 of 18 March 2016 implementing Regulation (EU) No 165/2014 of the European Parliament and of the Council laying down the requirements for the construction, testing, installation, operation and repair of tachographs and their components (Text with EEA relevance) (c. 799)

ANNEX I C U.K. Requirements for construction, testing, installation, and inspection

Appendix 11

COMMON SECURITY MECHANISMS U.K.

PART B U.K. SECOND-GENERATION TACHOGRAPH SYSTEM

11. VU — EXTERNAL GNSS FACILITY COUPLING, MUTUAL AUTHENTICATION AND SECURE MESSAGING U.K.

11.3. Mutual Certificate Chain Verification U.K.

11.3.1 General U.K.

CSM_205 Mutual certificate chain verification between a VU and an EGF shall take place only during the coupling of the VU and the EGF by a workshop. During normal operation of a coupled VU and EGF, no certificates shall be verified. Instead, the VU and EGF shall trust the certificates they stored during the coupling, after checking the temporal validity of these certificates. The VU and the EGF shall not trust any other certificates for protecting the VU — EGF communication during normal operation. U.K.